Rigby, Scion of Chaos

When Rigby, Scion of Chaos enters the battlefield, roll a d20. Rigby, Scion of Chaos
gains the resulting ability:
2-9: Haste
10-15: First Strike, +1/+1
16-19: Deathtouch, +2/+1
20: Gain all previous abilities combined
Rigby sows chaos across the universe.